Global Patent Index - EP 1562188 A1

EP 1562188 A1 20050810 - Improved rewritable optical storage medium

Title (en)

Improved rewritable optical storage medium

Title (de)

Verbessertes wiederbeschreibbares optisches Aufzeichnungsmedium

Title (fr)

Support d'enregistrement optique réinscriptible amélioré

Publication

EP 1562188 A1 20050810 (EN)

Application

EP 04002785 A 20040209

Priority

EP 04002785 A 20040209

Abstract (en)

An improved rewritable optical storage medium comprises from bottom to top a substrate, a first dielectric layer, a recording layer, a second dielectric layer, and a reflective layer. Nitrogen is added into the ZnS-SiO2 material of the first and second dielectric layers to enhance the shielding effect of the dielectric layers to the recording layer and also prevent sulfur of the dielectric layers from diffusing to the recording layer, thereby greatly increasing the number of rewritable times of the optical storage medium. <IMAGE>

IPC 1-7

G11B 7/24

IPC 8 full level

G11B 7/24 (2006.01); G11B 7/243 (2006.01); G11B 7/2433 (2013.01); G11B 7/257 (2006.01); G11B 7/2578 (2013.01); G11B 7/258 (2006.01)

CPC (source: EP)

G11B 7/2433 (2013.01); G11B 7/2578 (2013.01); G11B 7/258 (2013.01); G11B 2007/24308 (2013.01); G11B 2007/2431 (2013.01); G11B 2007/24312 (2013.01); G11B 2007/24314 (2013.01); G11B 2007/24316 (2013.01); G11B 2007/25713 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

DOCDB simple family (publication)

EP 1562188 A1 20050810

DOCDB simple family (application)

EP 04002785 A 20040209